Patents by Inventor Dimiter Hadjistamov

Dimiter Hadjistamov has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the preparation of epoxy resins with concurrent addition of glycidol and epihalohydrin
    Patent number: 5278260
    Abstract: A process for the preparation of epoxy resins having a specific reproducible content of .alpha.-glycol groups, which process comprises adding at least 0.0085 mol of glycidol or glycidol precursor compound per hydroxy-equivalent of a phenolic compound A which contains 2, 3 or 4 phenolic hydroxyl groups during the reaction of said phenolic compound A with an epihalohydrin which is unsubstituted or substituted in 2- or 3-position by C.sub.1 -C.sub.4 alkyl. The products may be used for surface protection.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: January 11, 1994
    Assignee: Ciba-Geigy Corporation
    Inventors: Werner Schaffner, Dimiter Hadjistamov